* Minor changes to the font2tga test program.

* Add Katakanas and Hiraganas to the default fonts.

fonts yet anyway :-)

limitation of 509 characters. Instead of doing:
       char foo[10] = "abcdefghij";
    we now do:
       struct { char f1[4], f2[4], f3[2]; } foo = { "abcd", "efgh", "ij" };

are unavailable, this is a significant gain.

good with Pango.

built-in font so that we now cover all of CP437.

* Implement htons/htonl in common.h just in case.

in all .c files that needed it.

so that the font can be easily rebuilt.

* Replaced the 8-bit internal font with a 4-bit one.